Comment 0 for bug 1523075

To fix the problem, I installed virtualbox-5.0 and the I had to reinstall (with --reinstall apt-get option) virtualbox-dkms.

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: virtualbox 5.0.10-dfsg-2ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
Uname: Linux 4.2.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Fri Dec 4 17:31:31 2015
DuplicateSignature: package:virtualbox:5.0.10-dfsg-2ubuntu1:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2011-05-03 (1676 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu1
SourcePackage: virtualbox
Title: package virtualbox 5.0.10-dfsg-2ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to wily on 2015-11-02 (31 days ago)